Prosthetic knee joint



FIG. 1 is a three quarter right side and rear view of the prosthetic knee joint;

FIG. 2 is a left side view of the prosthetic knee joint;

FIG. 3 is a right side view of the prosthetic knee joint;

FIG. 4 is a rear view of the prosthetic knee joint;

FIG. 5 is a front view of the prosthetic knee joint;

FIG. 6 is a top plan view of the prosthetic knee joint; and,

FIG. 7 is a bottom plan view of the prosthetic knee joint. 

The ornamental design for a prosthetic knee joint, as shown. 